Issue #118705 is marked as resolved but the problem is still there ?? 
for 1 { say "foo".subst: /(foo)/, {$/[0] ~ "o"}; }

#gives
# Use of Nil in string context  in block  at <unknown file>:1
# o

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tested with perl6 version 2015.11-1-ge88196a built on MoarVM version 2015.11

In reply to Re^2: perl6 match variable by jeckyhl
in thread perl6 match variable by jeckyhl

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